Bhagavad Gita Chapter 18, Verse 57
चेतसा सर्वकर्माणि मयि सन्न्यस्य मत्परः | बुद्धियोगमुपाश्रित्य मच्चित्तः सततं भव ||
cetasā sarvakarmāṇi mayi sannyasya matparaḥ buddhi-yogam upāśritya maccittaḥ satataṁ bhava
Having surrendered all actions to Me with your mind, having Me as the supreme goal, taking refuge in the yoga of intellect, with your mind fixed on Me, always be.
Krishna gives the final instruction on surrender. 'Cetasā sarvakarmāṇi mayi sannyasya matparaḥ'—having surrendered (sannyasya) all actions (sarva-karmāṇi) to Me (mayi) with your mind (cetasā), having Me as the supreme goal (mat-paraḥ). 'Buddhi-yogam upāśritya maccittaḥ satataṁ bhava'—taking refuge in (upāśritya) the yoga of intellect (buddhi-yogam), with your mind fixed on Me (mat-cittaḥ), always (satatam) be (bhava). This is the complete instruction: surrender all actions to Krishna with your mind, have Him as your supreme goal, take refuge in the yoga of intellect, and keep your mind fixed on Him always. This is the path of complete surrender: all actions are surrendered to the Supreme, and your mind is always fixed on Him. This leads to liberation.